Google Inc.’s chief legal officer, David Drummond, said in visit to Seoul Tuesday that the company is walking a fine line as it seeks reforms in the U.S. patent system in an effort to reduce the amount of litigation around mobile computing software and devices.

Google has been involved in numerous lawsuits over its Android software, used for smartphones and tablet computers, around the world. And several of the top manufacturers of Android-based products, including South Korea’s Samsung Electronics Co. and Taiwan’s HTC Corp. have also been swept in to litigation as proxies for Google by its software rivals Apple Inc. and Microsoft Corp.

In a meeting with reporters at a Google-sponsored innovation forum, Mr. Drummond said he doesn’t think that its rivals enjoy the litigious environment in which they’re all caught up. “It doesn’t take much digging to find statements from Apple, Microsoft, all lamenting the fact that we have this patent litigation,” he said.